Camera optical lens including six lenses of +−−++− refractive powers

ABSTRACT

The present disclosure relates to the field of optical lenses and provides a camera optical lens. The camera optical lens includes, from an object side to an image side: a first lens; a second lens having a negative refractive power; a third lens having a negative refractive power; a fourth lens; a fifth lens; and a sixth lens. The camera optical lens satisfies following conditions: −5.00≤f1/f2≤−2.00; and −20.00≤(R1+R2)/(R1−R2)≤−1.00. The camera optical lens can achieve a high imaging performance while obtaining a low TTL.

TECHNICAL FIELD

The present disclosure relates to the field of optical lens, and moreparticularly, to a camera optical lens suitable for handheld terminaldevices, such as smart phones or digital cameras, and imaging devices,such as monitors or PC lenses.

BACKGROUND

With the emergence of smart phones in recent years, the demand forminiature camera lens is increasing day by day, but in general thephotosensitive devices of camera lens are nothing more than ChargeCoupled Device (CCD) or Complementary Metal-Oxide Semiconductor Sensor(CMOS sensor), and as the progress of the semiconductor manufacturingtechnology makes the pixel size of the photosensitive devices becomesmaller, plus the current development trend of electronic productstowards better functions and thinner and smaller dimensions, miniaturecamera lenses with good imaging quality therefore have become amainstream in the market. In order to obtain better imaging quality, thelens that is traditionally equipped in mobile phone cameras adopts athree-piece or four-piece lens structure. Also, with the development oftechnology and the increase of the diverse demands of users, and as thepixel area of photosensitive devices is becoming smaller and smaller andthe requirement of the system on the imaging quality is improvingconstantly, the five-piece, six-piece and seven-piece lens structuresgradually appear in lens designs. There is an urgent need forultra-thin, wide-angle camera lenses with good optical characteristicsand fully corrected chromatic aberration.

BRIEF DESCRIPTION OF DRAWINGS

Many aspects of the exemplary embodiment can be better understood withreference to the following drawings. The components in the drawings arenot necessarily drawn to scale, the emphasis instead being placed uponclearly illustrating the principles of the present disclosure. Moreover,in the drawings, like reference numerals designate corresponding partsthroughout the several views.

FIG. 1 is a schematic diagram of a structure of a camera optical lens inaccordance with Embodiment 1 of the present disclosure;

FIG. 2 is a schematic diagram of a longitudinal aberration of the cameraoptical lens shown in FIG. 1;

FIG. 3 is a schematic diagram of a lateral color of the camera opticallens shown in FIG. 1;

FIG. 4 is a schematic diagram of a field curvature and a distortion ofthe camera optical lens shown in FIG. 1;

FIG. 5 is a schematic diagram of a structure of a camera optical lens inaccordance with Embodiment 2 of the present disclosure;

FIG. 6 is a schematic diagram of a longitudinal aberration of the cameraoptical lens shown in FIG. 5;

FIG. 7 is a schematic diagram of a lateral color of the camera opticallens shown in FIG. 5;

FIG. 8 is a schematic diagram of a field curvature and a distortion ofthe camera optical lens shown in FIG. 5;

FIG. 9 is a schematic diagram of a structure of a camera optical lens inaccordance with Embodiment 3 of the present disclosure;

FIG. 10 is a schematic diagram of a longitudinal aberration of thecamera optical lens shown in FIG. 9;

FIG. 11 is a schematic diagram of a lateral color of the camera opticallens shown in FIG. 9; and

FIG. 12 is a schematic diagram of a field curvature and a distortion ofthe camera optical lens shown in FIG. 9.

DESCRIPTION OF EMBODIMENTS

The present disclosure will hereinafter be described in detail withreference to several exemplary embodiments. To make the technicalproblems to be solved, technical solutions and beneficial effects of thepresent disclosure more apparent, the present disclosure is described infurther detail together with the figure and the embodiments. It shouldbe understood the specific embodiments described hereby is only toexplain the disclosure, not intended to limit the disclosure.

Embodiment 1

Referring to FIG. 1, the present disclosure provides a camera opticallens 10. FIG. 1 shows the camera optical lens 10 according to Embodiment1 of the present disclosure. The camera optical lens 10 includes 6lenses. Specifically, the camera optical lens 10 includes, from anobject side to an image side, an aperture S1, a first lens L1, a secondlens L2, a third lens L3, a fourth lens L4, a fifth lens L5, and a sixthlens L6. An optical element such as an optical filter GF can be arrangedbetween the sixth lens L6 and an image plane Si.

The first lens L1, the second lens L2, the third lens L3, the fourthlens L4, the fifth lens L5 and the sixth lens L6 are all made of aplastic material.

The second lens L2 has a negative refractive power, and the third lensL3 has a negative refractive power.

Here, a focal length of the first lens L1 is defined as f1, and a focallength of the second lens L2 is defined as f2. The camera optical lens10 should satisfy a condition of −5.00≤f1/f2≤−2.00. The appropriatedistribution of the refractive power leads to a better imaging qualityand a lower sensitivity. Preferably, −4.95≤f1/f2≤−2.00.

A curvature radius of an object side surface of the first lens L1 isdefined as R1 and a curvature radius of an image side surface of thefirst lens L1 is defined as R2. The camera optical lens 10 furthersatisfies a condition of −20.00≤(R1+R2)/(R1−R2)≤−1.00. This canreasonably control a shape of the first lens L1 in such a manner thatthe first lens L1 can effectively correct a spherical aberration of thecamera optical lens. Preferably, −19.96≤(R1+R2)/(R1−R2)≤−1.14.

A total optical length from the object side surface of the first lens L1to an image plane of the camera optical lens 10 along an optic axis isdefined as TTL. When the focal length of the first lens, the focallength of the second lens, the curvature radius of the object sidesurface of the first lens and the curvature radius of the image sidesurface of the first lens satisfy the above conditions, the cameraoptical lens will have the advantage of high performance and satisfy thedesign requirement of a low TTL.

In this embodiment, the object side surface of the first lens L1 isconvex in a paraxial region, the image side surface of the first lens L1is concave in the paraxial region, and the first lens L1 has a positiverefractive power.

Here, a focal length of the camera optical lens 10 is defined as f, anda focal length of the first lens L1 is defined as f1. The camera opticallens 10 should satisfy a condition of 2.46≤f1/f≤16.49, which specifies aratio of the focal length f1 of the first lens L1 and the focal length fof the camera optical lens 10. If the lower limit of the specified valueis exceeded, although it would facilitate development of ultra-thinlenses, the positive refractive power of the first lens L1 will be toostrong, and thus it is difficult to correct the problem like anaberration and it is also unfavorable for development of wide-anglelenses. On the contrary, if the upper limit of the specified value isexceeded, the positive refractive power of the first lens L1 wouldbecome too weak, and it is then difficult to develop ultra-thin lenses.Preferably, 3.94≤f1/f≤13.19.

An on-axis thickness of the first lens L1 is defined as d1. The cameraoptical lens 10 further satisfies a condition of 0.02≤d1/TTL≤0.14. Thisfacilitates achieving ultra-thin lenses. Preferably, 0.04≤d1/TTL≤0.11.

In this embodiment, an object side surface of the second lens L2 isconvex in the paraxial region, and an object side surface of the secondlens L2 is concave in the paraxial region.

The focal length of the camera optical lens 10 is defined as f, and afocal length of the second lens L2 is f2. The camera optical lens 10further satisfies a condition of −4.92≤f2/f≤−1.50. By controlling thenegative refractive power of the second lens L2 within the reasonablerange, correction of the aberration of the optical system can befacilitated. Preferably, −3.08≤f2/f≤−1.87.

A curvature radius of the object side surface of the second lens L2 isdefined as R3, and a curvature radius of the image side surface of thesecond lens L2 is defined as R4. The camera optical lens 10 furthersatisfies a condition of 3.51≤(R3+R4)/(R3−R4)≤11.26. This can reasonablycontrol a shape of the second lens L2. Out of this range, a developmenttowards ultra-thin and wide-angle lenses would make it difficult tocorrect the problem of the aberration. Preferably,5.62≤(R3+R4)/(R3−R4)≤9.01.

An on-axis thickness of the second lens L2 is defined as d3. The cameraoptical lens 10 further satisfies a condition of 0.02≤d3/TTL≤0.09. Thisfacilitates achieving ultra-thin lenses. Preferably, 0.04≤d3/TTL≤0.07.

In this embodiment, an object side surface of the third lens L3 isconvex in the paraxial region, and an image side surface of the thirdlens L3 is concave in the paraxial region.

The focal length of the camera optical lens 10 is defined as f, and afocal length of the third lens L3 is f3. The camera optical lens 10further satisfies a condition of −1.05E+06≤f3/f≤−0.89. When thecondition is satisfied, the field curvature of the system can beeffectively balanced for further improving the image quality.Preferably, −6.56E+05≤f3/f≤−1.11.

A curvature radius of the object side surface of the third lens L3 isdefined as R5, and a curvature radius of the image side surface of thethird lens L3 is defined as R6. The camera optical lens 10 furthersatisfies a condition of 1.14≤(R5+R6)/(R5−R6)≤56.32. This caneffectively control a shape of the third lens L3, thereby facilitatingshaping of the third lens L3 and avoiding bad shaping and generation ofstress due to the overly large surface curvature of the third lens L3.Preferably, 1.83≤(R5+R6)/(R5−R6)≤45.06.

An on-axis thickness of the third lens L3 is defined as d5. The cameraoptical lens 10 further satisfies a condition of 0.02≤d5/TTL≤0.15. Thisfacilitates achieving ultra-thin lenses. Preferably, 0.03≤d5/TTL≤0.12.

In this embodiment, an object side surface of the fourth lens L4 isconvex in the paraxial region, an image side surface of the fourth lensL4 is concave in the paraxial region, and the fourth lens L4 has apositive refractive power.

The focal length of the camera optical lens 10 is defined as f, and afocal length of the fourth lens L4 is f4. The camera optical lens 10further satisfies a condition of 0.88≤f4/f≤4.50. The appropriatedistribution of the refractive power leads to a better imaging qualityand a lower sensitivity. Preferably, 1.40≤f4/f≤3.60.

A curvature radius of an object side surface of the fourth lens L4 isdefined as R7, and a curvature radius of the image side surface of thefourth lens L4 is defined as R8. The camera optical lens 10 furthersatisfies a condition of −17.96≤(R7+R8)/(R7−R8)≤−4.84, which specifies ashape of the fourth lens L4. Out of this range, a development towardsultra-thin and wide-angle lenses would make it difficult to correct theproblem like an off-axis aberration. Preferably,−11.23≤(R7+R8)/(R7−R8)≤−6.05.

An on-axis thickness of the fourth lens L4 is defined as d7. The cameraoptical lens 10 further satisfies a condition of 0.02≤d7/TTL≤0.08. Thisfacilitates achieving ultra-thin lenses. Preferably, 0.04≤d7/TTL≤0.06.

In this embodiment, an object side surface of the fifth lens L5 isconvex in the paraxial region, an image side surface of the fifth lensL5 is convex in the paraxial region, and the fifth lens L5 has apositive refractive power.

The focal length of the camera optical lens 10 is defined as f, and afocal length of the fifth lens L5 is f5. The camera optical lens 10further satisfies a condition of 0.28≤f5/f≤1.03. This can effectivelymake a light angle of the camera lens gentle and reduce the tolerancesensitivity. Preferably, 0.44≤f5/f≤0.82.

A curvature radius of the object side surface of the fifth lens L5 isdefined as R9, and a curvature radius of the image side surface of thefifth lens L5 is defined as R10. The camera optical lens 10 furthersatisfies a condition of 0.07≤(R9+R10)/(R9−R10)≤0.84, which specifies ashape of the fifth lens L5. Out of this range, a development towardsultra-thin and wide-angle lenses would make it difficult to correct theproblem like an off-axis aberration. Preferably,0.11≤(R9+R10)/(R9−R10)≤0.67.

An on-axis thickness of the fifth lens L5 is defined as d9. The cameraoptical lens 10 further satisfies a condition of 0.04≤d9/TTL≤0.21. Thisfacilitates achieving ultra-thin lenses. Preferably, 0.07≤d9/TTL≤0.17.

In this embodiment, an image side surface of the sixth lens L6 isconcave in the paraxial region, and the sixth lens L6 has a negativerefractive power.

The focal length of the camera optical lens 10 is defined as f, and afocal length of the sixth lens L6 is f6. The camera optical lens 10further satisfies a condition of −1.94≤f6/f≤−0.57. The appropriatedistribution of the refractive power leads to a better imaging qualityand a lower sensitivity. Preferably, 1.21≤f6/f≤−0.71.

A curvature radius of an object side surface of the sixth lens L6 isdefined as R11, and a curvature radius of the image side surface of thesixth lens L6 is defined as R12. The camera optical lens 10 furthersatisfies a condition of 0.00≤(R11+R12)/(R11−R12)≤2.04, which specifiesa shape of the sixth lens L6. Out of this range, a development towardsultra-thin and wide-angle lenses would make it difficult to correct theproblem like an off-axis aberration. Preferably,0.01≤(R11+R12)/(R11−R12)≤1.63.

An on-axis thickness of the sixth lens L6 is defined as d11. The cameraoptical lens 10 further satisfies a condition of 0.02≤d11/TTL≤0.11. Thisfacilitates achieving ultra-thin lenses. Preferably, 0.03≤d11/TTL≤0.09.

In this embodiment, the focal length of the camera optical lens 10 isdefined as f, and a combined focal length of the first lens L1 and thesecond lens L2 is f12. The camera optical lens 10 further satisfies acondition of −14.13≤f12/f≤−1.96. This can eliminate the aberration anddistortion of the camera optical lens while suppressing a back focallength of the camera optical lens, thereby maintaining miniaturizationof the camera lens system. Preferably, −8.83≤f12/f≤−2.45.

In this embodiment, the total optical length TTL of the camera opticallens 10 is smaller than or equal to 6.46 mm, which is beneficial forachieving ultra-thin lenses. Preferably, the total optical length TTL ofthe camera optical lens 10 is smaller than or equal to 6.17 mm.

In this embodiment, the camera optical lens 10 has a large F number,which is smaller than or equal to 2.19. The camera optical lens 10 has abetter imaging performance. Preferably, the F number of the cameraoptical lens 10 is smaller than or equal to 2.15.

With such design, the total optical length TTL of the camera opticallens 10 can be made as short as possible, and thus the miniaturizationcharacteristics can be maintained.

In the following, examples will be used to describe the camera opticallens 10 of the present disclosure. The symbols recorded in each examplewill be described as follows. The focal length, on-axis distance,curvature radius, on-axis thickness, inflexion point position, andarrest point position are all in units of mm.

TTL: Optical length (the total optical length from the object sidesurface of the first lens to the image plane of the camera optical lensalong the optic axis) in mm.

Preferably, inflexion points and/or arrest points can be arranged on theobject side surface and/or image side surface of the lens, so as tosatisfy the demand for the high quality imaging. The description belowcan be referred to for specific implementations.

The design information of the camera optical lens 10 in Embodiment 1 ofthe present disclosure is shown in Tables 1 and 2.

TABLE 1 R d nd νd S1 ∞ d0 = −0.401 R1 2.044 d1 =  0.500 nd1 1.5457 ν.55.95 R2 2.260 d2 =  0.070 R3 1.478 d3 =  0.343 nd2 1.6664 ν. 20.40 R41.112 d4 =  0.130 R5 2.222 d5 =  0.198 nd3 1.5457 ν. 55.95 R6 2.107 d6 = 0.012 R7 1.690 d7 =  0.290 nd4 1.6664 ν. 20.40 R8 2.199 d8 =  0.492 R95.875 d9 =  0.776 nd5 1.5457 ν. 55.95 R10 −1.803 d10 =  0.908 R11 −4.055d11 =  0.231 nd6 1.5137 ν. 56.26 R12 3.988 d12 =  0.350 R13 ∞ d13 = 0.210 ndg 1.5183 ν. 64.17 R14 ∞ d14 =  0.984

In the table, meanings of various symbols will be described as follows.

S1: aperture;

R: curvature radius of an optical surface, a central curvature radiusfor a lens;

R1: curvature radius of the object side surface of the first lens L1;

R2: curvature radius of the image side surface of the first lens L1;

R3: curvature radius of the object side surface of the second lens L2;

R4: curvature radius of the image side surface of the second lens L2;

R5: curvature radius of the object side surface of the third lens L3;

R6: curvature radius of the image side surface of the third lens L3;

R7: curvature radius of the object side surface of the fourth lens L4;

R8: curvature radius of the image side surface of the fourth lens L4;

R9: curvature radius of the object side surface of the fifth lens L5;

R10: curvature radius of the image side surface of the fifth lens L5;

R11: curvature radius of the object side surface of the sixth lens L6;

R12: curvature radius of the image side surface of the sixth lens L6;

R13: curvature radius of an object side surface of the optical filterGF;

R14: curvature radius of an image side surface of the optical filter GF;

d: on-axis thickness of a lens and an on-axis distance between lenses;

d0: on-axis distance from the aperture S1 to the object side surface ofthe first lens L1;

d1: on-axis thickness of the first lens L1;

d2: on-axis distance from the image side surface of the first lens L1 tothe object side surface of the second lens L2;

d3: on-axis thickness of the second lens L2;

d4: on-axis distance from the image side surface of the second lens L2to the object side surface of the third lens L3;

d5: on-axis thickness of the third lens L3;

d6: on-axis distance from the image side surface of the third lens L3 tothe object side surface of the fourth lens L4;

d7: on-axis thickness of the fourth lens L4;

d8: on-axis distance from the image side surface of the fourth lens L4to the object side surface of the fifth lens L5;

d9: on-axis thickness of the fifth lens L5;

d10: on-axis distance from the image side surface of the fifth lens L5to the object side surface of the sixth lens L6;

d11: on-axis thickness of the sixth lens L6;

d12: on-axis distance from the image side surface of the sixth lens L6to the object side surface of the optical filter GF;

d13: on-axis thickness of the optical filter GF;

d14: on-axis distance from the image side surface of the optical filterGF to the image plane;

nd: refractive index of d line;

nd1: refractive index of d line of the first lens L1;

nd2: refractive index of d line of the second lens L2;

nd3: refractive index of d line of the third lens L3;

nd4: refractive index of d line of the fourth lens L4;

nd5: refractive index of d line of the fifth lens L5;

nd6: refractive index of d line of the sixth lens L6;

ndg: refractive index of d line of the optical filter GF;

vd: abbe number;

v1: abbe number of the first lens L1;

v2: abbe number of the second lens L2;

v3: abbe number of the third lens L3;

v4: abbe number of the fourth lens L4;

v5: abbe number of the fifth lens L5;

v6: abbe number of the sixth lens L6;

vg: abbe number of the optical filter GF.

Table 2 shows aspherical surface data of the camera optical lens 10 inEmbodiment 1 of the present disclosure.

TABLE 2 Conic coefficient Aspherical surface coefficients k A4 A6 A8 A10A12 A14 A16 R1  1.8553E+00 −4.0919E−02  8.2224E−02 −2.0296E−01 3.2292E−01 −3.0621E−01  1.5968E−01 −3.6393E−02 R2 −4.0696E+01−1.7137E−02  2.2786E−01 −2.6546E−01  3.8852E−01 −2.5880E−01 −4.5933E−02 9.5352E−02 R3 −9.2879E−01 −4.0129E−01  5.8886E−01 −3.4072E−01 5.4765E−02 −9.9738E−02  1.1291E−01 −3.7583E−02 R4 −5.5709E−01−2.5621E−01  2.8680E−01 −4.1736E−01  1.4363E+00 −2.6447E+00  2.1936E+00−7.0821E−01 R5  2.0543E+00 −4.7958E−03 −2.0512E−01  3.5709E−01−7.8279E−01  1.6299E+00 −1.3322E+00  3.2777E−01 R6  1.8868E+00−3.0466E−01 −1.7103E−01  1.4035E+00 −2.4573E+00  2.4406E+00 −1.2307E+00 2.1142E−01 R7  1.2213E+00 −4.2983E−01  1.7772E−01  1.9824E−01 4.4402E−01 −1.7726E+00  1.7475E+00 −5.8344E−01 R8  1.6330E+00−8.3558E−02 −1.4448E−01  4.5618E−01 −5.1499E−01  2.0004E−01  1.6242E−02−8.2716E−03 R9 −5.7643E+02  1.0435E−01 −1.1371E−01 −1.8140E−02 2.6275E−01 −3.4700E−01  2.0015E−01 −4.4822E−02 R10 −2.6812E+00−6.6303E−02  2.0919E−02 −6.6118E−02  1.3339E−01 −1.3690E−01  7.1028E−02−1.5056E−02 R11  3.3589E+00 −2.6068E−01  1.2358E−01 −8.8994E−03−1.5644E−02  4.7195E−03 −1.9992E−03  5.0509E−04 R12 −5.1777E+01−1.7512E−01  1.2016E−01 −5.0326E−02  1.3919E−02 −2.5939E−03  3.1350E−04−2.3046E−05

Here, K is a conic coefficient, and A4, A6, A8, A10, A12, A14 and A16are aspheric surface coefficients.

IH: Image Heighty=(x ² /R)/[1+{1−(k+1)(x ² /R ²)}^(1/2)]+A4x ⁴ +A6x ⁶ +A8x ⁸ +A10x ¹⁰+A12x ¹² +A14x ¹⁴ +A16x ¹⁶  (1)

For convenience, an aspheric surface of each lens surface uses theaspheric surfaces shown in the above formula (1). However, the presentdisclosure is not limited to the aspherical polynomials form shown inthe formula (1).

Table 3 and Table 4 show design data of inflexion points and arrestpoints of respective lens in the camera optical lens 10 according toEmbodiment 1 of the present disclosure. P1R1 and P1R2 represent theobject side surface and the image side surface of the first lens L1,P2R1 and P2R2 represent the object side surface and the image sidesurface of the second lens L2, P3R1 and P3R2 represent the object sidesurface and the image side surface of the third lens L3, P4R1 and P4R2represent the object side surface and the image side surface of thefourth lens L4, P5R1 and P5R2 represent the object side surface and theimage side surface of the fifth lens L5, and P6R1 and P6R2 represent theobject side surface and the image side surface of the sixth lens L6. Thedata in the column named “inflexion point position” refers to verticaldistances from inflexion points arranged on each lens surface to theoptic axis of the camera optical lens 10. The data in the column named“arrest point position” refers to vertical distances from arrest pointsarranged on each lens surface to the optic axis of the camera opticallens 10.

TABLE 3 Number of Inflexion point inflexion points position 1 P1R1 0 0P1R2 0 0 P2R1 0 0 P2R2 0 0 P3R1 0 0 P3R2 0 0 P4R1 0 0 P4R2 0 0 P5R1 0 0P5R2 0 0 P6R1 0 0 P6R2 1 0.595

TABLE 4 Number of Arrest point arrest points position 1 P1R1 0 0 P1R2 00 P2R1 1 0.855 P2R2 1 0.905 P3R1 1 0.965 P3R2 0 0 P4R1 0 0 P4R2 0 0 P5R11 1.115 P5R2 0 0 P6R1 0 0 P6R2 1 0.315

FIG. 2 and FIG. 3 illustrate a longitudinal aberration and a lateralcolor of light with wavelengths of 470.0 nm, 555.0 nm and 650.0 nm afterpassing the camera optical lens 10 according to Embodiment 1. FIG. 4illustrates a field curvature and a distortion of light with awavelength of 555.0 nm after passing the camera optical lens 10according to Embodiment 1, in which a field curvature S is a fieldcurvature in a sagittal direction and T is a field curvature in atangential direction.

Table 13 shows various values of Embodiments 1, 2 and 3 and valuescorresponding to parameters which are specified in the above conditions.

As shown in Table 13, Embodiment 1 satisfies the above conditions.

In this embodiment, the entrance pupil diameter of the camera opticallens is 2.060 mm. The image height of 1.0H is 2.906 mm. The FOV (fieldof view) is 66.37°. Thus, the camera optical lens has a wide-angle andis ultra-thin. Its on-axis and off-axis chromatic aberrations are fullycorrected, thereby achieving excellent optical characteristics.

Embodiment 2

Embodiment 2 is basically the same as Embodiment 1 and involves symbolshaving the same meanings as Embodiment 1, and only differencestherebetween will be described in the following.

Table 5 and Table 6 show design data of a camera optical lens 20 inEmbodiment 2 of the present disclosure.

TABLE 5 R d nd νd S1 ∞ d0 = −0.401 R1 21.763 d1 =  0.274 nd1 1.5462 ν.55.95 R2 179.776 d2 =  0.070 R3 1.249 d3 =  0.304 nd2 1.6682 ν. 20.40 R40.938 d4 =  0.233 R5 2.950 d5 =  0.579 nd3 1.5462 ν. 55.95 R6 2.746 d6 = 0.022 R7 2.034 d7 =  0.290 nd4 1.6682 ν. 20.40 R8 2.544 d8 =  0.194 R96.910 d9 =  0.511 nd5 1.5462 ν. 55.95 R10 −1.935 d10 =  2.117 R11 11.365d11 =  0.370 nd6 1.5142 ν. 56.26 R12 1.722 d12 =  0.350 R13 ∞ d13 = 0.210 ndg 1.5183 ν. 64.17 R14 ∞ d14 =  0.202

Table 6 shows aspherical surface data of each lens of the camera opticallens 20 in Embodiment 2 of the present disclosure.

TABLE 6 Conic coefficient Aspherical surface coefficients k A4 A6 A8 A10A12 A14 A16 R1  1.4944E+02  3.0605E−01 −1.0456E−01 −1.1149E−01 2.9921E−01 −2.7498E−01  1.2369E−01 −1.8898E−02 R2 −9.1575E+05 3.6299E−01  3.2291E−02 −2.3799E−01  4.0673E−01 −2.9703E−01 −7.4770E−03 1.2677E−01 R3 −4.6020E+00 −1.7883E−01  4.4583E−01 −3.9332E−01 4.4609E−02  1.6998E−01 −9.7363E−02  1.1616E−02 R4 −4.4679E+00−2.0079E−01  3.6941E−01 −6.9094E−01  1.5928E+00 −2.5054E+00  2.1030E+00−6.8332E−01 R5  7.0602E+00 −1.3809E−01 −2.4106E−02  1.8751E−01−8.2338E−01  1.5931E+00 −1.4222E+00  4.5880E−01 R6 −3.8638E+02−4.3931E−01  3.5552E−02  1.3580E+00 −2.7579E+00  2.4406E+00 −1.0565E+00 1.8931E−01 R7 −1.0313E+02 −6.4468E−01  4.0875E−01  1.0394E−01 4.1432E−01 −1.6651E+00  1.6459E+00 −5.1745E−01 R8 −2.8028E+01−2.9909E−01 −4.1648E−02  6.6235E−01 −1.0334E+00  8.7804E−01 −4.1572E−01 8.7766E−02 R9 −9.9849E+01 −5.7111E−02 −7.6629E−04 −9.9685E−02 3.2290E−01 −2.9890E−01  1.2141E−01 −1.8620E−02 R10 −2.1663E+00−2.0374E−02  7.8552E−02 −1.4948E−01  1.6868E−01 −7.9839E−02  1.7846E−02−1.5733E−03 R11  3.1803E+01 −2.9136E−01  1.2406E−01 −1.0074E−02−1.5805E−02  5.8139E−03 −5.8074E−04 −6.2419E−06 R12 −7.2997E+00−1.7032E−01  1.1180E−01 −4.9782E−02  1.4084E−02 −2.4450E−03  2.3588E−04−9.5847E−06

Table 7 and Table 8 show design data of inflexion points and arrestpoints of respective lens in the camera optical lens 20 according toEmbodiment 2 of the present disclosure.

TABLE 7 Number of Inflexion point Inflexion point inflexion pointsposition 1 position 2 P1R1 0 0 0 P1R2 0 0 0 P2R1 0 0 0 P2R2 0 0 0 P3R1 00 0 P3R2 1 0.305 0 P4R1 1 0.335 0 P4R2 1 0.515 0 P5R1 2 0.705 0.815 P5R21 1.165 0 P6R1 1 0.285 0 P6R2 1 1.085 0

TABLE 8 Number of Arrest point Arrest point arrest points position 1position 2 P1R1 0 0 0 P1R2 0 0 0 P2R1 0 0 0 P2R2 0 0 0 P3R1 2 0.5750.905 P3R2 1 0.155 0 P4R1 2 0.175 0.875 P4R2 2 0.275 0.935 P5R1 2 0.3750.775 P5R2 1 0.855 0 P6R1 1 0.165 0 P6R2 2 0.485 2.265

FIG. 6 and FIG. 7 illustrate a longitudinal aberration and a lateralcolor of light with wavelengths of 470.0 nm, 555.0 nm and 650.0 nm afterpassing the camera optical lens 20 according to Embodiment 2. FIG. 8illustrates a field curvature and a distortion of light with awavelength of 555.0 nm after passing the camera optical lens 20according to Embodiment 2.

As shown in Table 13, Embodiment 2 satisfies the above conditions.

In this embodiment, the entrance pupil diameter of the camera opticallens is 2.061 mm. The image height of 1.0H is 2.906 mm. The FOV (fieldof view) is 69.60°. Thus, the camera optical lens has a wide-angle andis ultra-thin. Its on-axis and off-axis chromatic aberrations are fullycorrected, thereby achieving excellent optical characteristics.

Embodiment 3

Embodiment 3 is basically the same as Embodiment 1 and involves symbolshaving the same meanings as Embodiment 1, and only differencestherebetween will be described in the following.

Table 9 and Table 10 show design data of a camera optical lens 30 inEmbodiment 3 of the present disclosure.

TABLE 9 R d nd νd S1 ∞ d0 = −0.401 R1 10.259 d1 =  0.336 nd1 1.5462 ν.55.95 R2 50.294 d2 =  0.070 R3 1.371 d3 =  0.289 nd2 1.6682 ν. 20.40 R41.049 d4 =  0.272 R5 4.466 d5 =  0.494 nd3 1.5462 ν. 55.95 R6 1.750 d6 = 0.027 R7 1.490 d7 =  0.290 nd4 1.6682 ν. 20.40 R8 1.966 d8 =  0.162 R92.858 d9 =  0.556 nd5 1.5462 ν. 55.95 R10 −2.153 d10 =  2.199 R11 20.488d11 =  0.424 nd6 1.5142 ν. 56.26 R12 1.694 d12 =  0.350 R13 ∞ d13 = 0.210 ndg 1.5183 ν. 64.17 R14 ∞ d14 =  0.196

Table 10 shows aspherical surface data of each lens of the cameraoptical lens 30 in Embodiment 3 of the present disclosure.

TABLE 10 Conic coefficient Aspherical surface coefficients k A4 A6 A8A10 A12 A14 A16 R1 −6.1545E+02  2.7373E−01 −8.6403E−02 −1.1162E−01 2.9105E−01 −2.7367E−01  1.3005E−01 −2.2845E−02 R2 −4.2366E+05 3.4251E−01  2.2244E−02 −2.4539E−01  4.2203E−01 −2.7861E−01 −3.0158E−02 1.3474E−01 R3 −2.7248E+00 −1.8094E−01  4.3239E−01 −3.9158E−01 5.0176E−02  1.6619E−01 −9.0643E−02  1.6971E−03 R4 −4.8373E+00−1.4927E−01  3.6905E−01 −7.1041E−01  1.5973E+00 −2.5000E+00  2.1073E+00−7.0673E−01 R5  1.1722E+01 −1.1725E−01  1.9233E−02  2.1346E−01−8.1982E−01  1.5785E+00 −1.4290E+00  4.8505E−01 R6 −2.3213E+02−4.2287E−01 −5.2804E−03  1.3811E+00 −2.7581E+00  2.4406E+00 −1.0588E+00 1.9497E−01 R7 −1.1278E+02 −6.4570E−01  4.1488E−01  8.1055E−02 4.1548E−01 −1.6616E+00  1.6431E+00 −5.1146E−01 R8 −4.1691E+01−2.9198E−01 −4.9780E−02  6.6427E−01 −1.0262E+00  8.7509E−01 −4.1645E−01 8.6526E−02 R9 −3.8997E+01 −6.3202E−02  1.2007E−03 −9.9787E−02 3.1996E−01 −2.9776E−01  1.2204E−01 −1.8982E−02 R10 −2.8215E+00−2.2547E−02  6.7072E−02 −1.5173E−01  1.6977E−01 −8.0343E−02  1.8173E−02−1.5246E−03 R11  1.2518E+02 −2.9556E−01  1.2357E−01 −1.1238E−02−1.5592E−02  5.8553E−03 −6.0092E−04 −1.2091E−05 R12 −7.1883E+00−1.7516E−01  1.1098E−01 −4.9618E−02  1.4095E−02 −2.4445E−03  2.3553E−04−9.6415E−06

Table 11 and table 12 show design data of inflexion points and arrestpoints of respective lens in the camera optical lens 30 according toEmbodiment 3 of the present disclosure.

TABLE 11 Number of inflexion Inflexion point Inflexion point pointsposition 1 position 2 P1R1 0 0 0 P1R2 0 0 0 P2R1 0 0 0 P2R2 0 0 0 P3R1 00 0 P3R2 1 0.335 0 P4R1 2 0.335 1.075 P4R2 2 0.505 1.135 P5R1 0 0 0 P5R21 1.205 0 P6R1 1 0.205 0 P6R2 1 1.035 0

TABLE 12 Number of Arrest point Arrest point arrest points position 1position 2 P1R1 0 0 0 P1R2 0 0 0 P2R1 1 0.975 0 P2R2 1 0.975 0 P3R1 0 00 P3R2 2 0.165 1.005 P4R1 2 0.165 0.885 P4R2 2 0.265 0.945 P5R1 2 0.4250.785 P5R2 1 0.905 0 P6R1 1 0.125 0 P6R2 1 0.475 0

FIG. 10 and FIG. 11 illustrate a longitudinal aberration and a lateralcolor of light with wavelengths of 470.0 nm, 555.0 nm and 650.0 nm afterpassing the camera optical lens 30 according to Embodiment 3. FIG. 12illustrates field curvature and distortion of light with a wavelength of555.0 nm after passing the camera optical lens 30 according toEmbodiment 3.

Table 13 in the following lists values corresponding to the respectiveconditions in this embodiment in order to satisfy the above conditions.The camera optical lens according to this embodiment satisfies the aboveconditions.

In this embodiment, the entrance pupil diameter of the camera opticallens is 2.116 mm. The image height of 1.0H is 2.906 mm. The FOV (fieldof view) is 68.18°. Thus, the camera optical lens has a wide-angle andis ultra-thin. Its on-axis and off-axis chromatic aberrations are fullycorrected, thereby achieving excellent optical characteristics.

TABLE 13 Parameters and Embodiment Embodiment Embodiment conditions 1 23 f 4.380 4.121 4.232 f1 21.560 45.301 23.524 f2 −10.785 −9.259 −10.407f3 −189.440 −2.161E+06 −5.631 f4 8.930 12.377 7.409 f5 2.621 2.825 2.340f6 −3.877 −3.998 −3.618 f12 −30.955 −12.133 −21.054 FNO 2.13 2.00 2.00f1/f2 −2.00 −4.89 −2.26 (R1 + R2)/(R1 − R2) −19.93 −1.28 −1.51

It can be appreciated by one having ordinary skill in the art that thedescription above is only embodiments of the present disclosure. Inpractice, one having ordinary skill in the art can make variousmodifications to these embodiments in forms and details withoutdeparting from the spirit and scope of the present disclosure.

What is claimed is:
 1. A camera optical lens, comprising, from an objectside to an image side: a first lens; a second lens having a negativerefractive power; a third lens having a negative refractive power; afourth lens; a fifth lens; and a sixth lens, wherein the camera opticallens satisfies following conditions:5.00≤f1/f2≤−2.00;−20.00≤(R1+R2)/(R1−R2)≤−1.00; andTTL≤6.46, Where f1 denotes a focal length of the first lens; f2 denotesa focal length of the second lens; R1 denotes a curvature radius of anobject side surface of the first lens; R2 denotes a curvature radius ofan image side surface of the first lens; and TTL denotes a total opticallength from the object side surface of the first lens to an image planeof the camera optical lens along an optic axis.
 2. The camera opticallens as described in claim 1, further satisfying following conditions:−4.95≤f1/f2≤−2.00; and−19.96≤(R1+R2)/(R1−R2)≤−1.14.
 3. The camera optical lens as described inclaim 1, wherein the first lens has a positive refractive power, theobject side surface of the first lens is convex in a paraxial region,and the image side surface of the first lens is concave in the paraxialregion, and the camera optical lens further satisfies followingconditions:2.46≤f1/f≤16.49; and0.02≤d1/TTL≤0.14, Where f denotes a focal length of the camera opticallens; d1 denotes an on-axis thickness of the first lens.
 4. The cameraoptical lens as described in claim 3, further satisfying followingconditions:3.94≤f1/f≤13.19; and0.04≤d1/TTL≤0.11,
 5. The camera optical lens as described in claim 1,wherein the second lens comprises an object side surface being convex ina paraxial region and an image side surface being concave in theparaxial region, and the camera optical lens further satisfies followingconditions:−4.92≤f2/f≤−1.50;3.51≤(R3+R4)/(R3−R4)≤11.26; and0.02≤d3/TTL≤0.09, Where f denotes a focal length of the camera opticallens; R3 denotes a curvature radius of the object side surface of thesecond lens; R4 denotes a curvature radius of the image side surface ofthe second lens; d3 denotes an on-axis thickness of the second lens. 6.The camera optical lens as described in claim 5, further satisfyingfollowing conditions:−3.08≤f2/f≤−1.87;5.62≤(R3+R4)/(R3−R4)≤9.01; and0.04≤d3/TTL≤0.07.
 7. The camera optical lens as described in claim 1,wherein the third lens comprises an object side surface being convex ina paraxial region and an image side surface being concave in theparaxial region, and the camera optical lens further satisfies followingconditions:−1.05E+06≤f3/f≤−0.89;1.14≤(R5+R6)/(R5−R6)≤56.32; and0.02≤d5/TTL≤0.15, Where f denotes a focal length of the camera opticallens; f3 denotes a focal length of the third lens; R5 denotes acurvature radius of the object side surface of the third lens; R6denotes a curvature radius of the image side surface of the third lens;d5 denotes an on-axis thickness of the third lens.
 8. The camera opticallens as described in claim 7, further satisfying following conditions:−6.56E+05≤f3/f≤−1.11;1.83≤(R5+R6)/(R5−R6)≤45.06; and0.03≤d5/TTL≤0.12.
 9. The camera optical lens as described in claim 1,wherein the fourth lens has a positive refractive power, and comprisesan object side surface being convex in a paraxial region and an imageside surface being concave in the paraxial region, and the cameraoptical lens further satisfies following conditions:0.88≤f4/f≤4.50;−17.96≤(R7+R8)/(R7−R8)≤−4.84; and0.02≤d7/TTL≤0.08, Where f denotes a focal length of the camera opticallens; f4 denotes a focal length of the fourth lens; R7 denotes acurvature radius of the object side surface of the fourth lens; R8denotes a curvature radius of the image side surface of the fourth lens;d7 denotes an on-axis thickness of the fourth lens.
 10. The cameraoptical lens as described in claim 9, further satisfying followingconditions:1.40≤f4≤/f≤3.60;−11.23≤(R7+R8)/(R7−R8)≤−6.05; and0.04≤d7/TTL≤0.06.
 11. The camera optical lens as described in claim 1,wherein the fifth lens has a positive refractive power, and comprises anobject side surface being convex in a paraxial region and an image sidesurface being convex in the paraxial region, and the camera optical lensfurther satisfies following conditions:0.28≤f5/f≤1.03;0.07≤(R9+R10)/(R9−R10)≤0.84; and0.04≤d9/TTL≤0.21, Where f denotes a focal length of the camera opticallens; f5 denotes a focal length of the fifth lens; R9 denotes acurvature radius of the object side surface of the fifth lens; R10denotes a curvature radius of the image side surface of the fifth lens;d9 denotes an on-axis thickness of the fifth lens.
 12. The cameraoptical lens as described in claim 11, further satisfying followingconditions:0.44≤f5/f≤0.82;0.11≤(R9+R10)/(R9−R10)≤0.67; and0.07≤d9/TTL≤0.17.
 13. The camera optical lens as described in claim 1,wherein the sixth lens has a negative refractive power, and comprises animage side surface being concave in a paraxial region, and the cameraoptical lens further satisfies following conditions:−1.94≤f6/f≤−0.57;0.00≤(R11+R12)/(R11−R12)≤2.04; and0.02≤d11/TTL≤0.11, Where f denotes a focal length of the camera opticallens; f6 denotes a focal length of the sixth lens; R11 denotes acurvature radius of an object side surface of the sixth lens; R12denotes a curvature radius of the image side surface of the sixth lens;d11 denotes an on-axis thickness of the sixth lens.
 14. The cameraoptical lens as described in claim 13, further satisfying followingconditions:−1.21≤f6/f≤−0.71;0.01≤(R11+R12)/(R11−R12)≤1.63; and0.03≤d11/TTL≤0.09.
 15. The camera optical lens as described in claim 1,further satisfying a following condition:−14.13≤f12/f≤−1.96, Where f denotes a focal length of the camera opticallens; and f12 denotes a combined focal length of the first lens and thesecond lens.
 16. The camera optical lens as described in claim 15,further satisfying a following condition:−8.83≤f12/f≤−2.45.
 17. The camera optical lens as described in claim 1,further satisfying a following condition:TTL≤6.17.
 18. The camera optical lens as described in claim 1, whereinan F number of the camera optical lens is smaller than or equal to 2.19.19. The camera optical lens as described in claim 18, wherein the Fnumber of the camera optical lens is smaller than or equal to 2.15.